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- W2007185441 abstract "Norwich’s entropy theory of perception (plus a few additional assumptions) suggests the existence of an “informational adaptation curve” (change in stimulus equivocation with stimulus duration) for suprathreshold prothetic stimuli that is synchronous with the “neural adaptation curve” (change in firing rate with stimulus duration) observed for sensory neurons. Five experiments are reported in which informational adaptation curves were measured for auditory and visual stimuli by having subjects make absolute identifications of suprathreshold sound or light intensities of various durations. Information transmissions for the shortest duration stimuli (1 and 5 msec, respectively, for light and sound) were surprisingly large (small equivocations), indicating that intensity information is acquired very rapidly by the whole organism. The equations of entropy theory were fitted to adaptation data for peripheral sensory neurons (spiral ganglion cells and retinal ganglion cells) and were compared to the informational adaptation curves. It was found that informational adaptation occurred more rapidly than neural adaptation. That is, the two types of adaptation process are asynchronous. However, for both audition and vision, the total amount of information mediated by the adaptation process (channel capacity) was-about the same for both types of processes (2.03 bits vs. 2.1 bits per stimulus for sound intensity; 1.3 vs. 2.0 bits per stimulus for light intensity). Faster acquisition could be accomplished in the whole organism through convergent neural circuits that increase sampling, rate-by pooling the samples taken by individual receptor systems" @default.
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- W2007185441 date "1991-03-01" @default.
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- W2007185441 title "Informational and neural adaptation curves are asynchronous" @default.
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- W2007185441 doi "https://doi.org/10.3758/bf03212213" @default.
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